// hash路由
class Route{
    constructor(){
      // 路由存储对象
      this.routes = {}
      // 当前hash
      this.currentHash = ''
      // 绑定this，避免监听时this指向改变
      this.freshRoute = this.freshRoute.bind(this)
      // 监听
      window.addEventListener('load', this.freshRoute, false)
      window.addEventListener('hashchange', this.freshRoute, false)
    }
    // 存储
    storeRoute (path, cb) {
      this.routes[path] = cb || function () {}
    }
    // 更新
    freshRoute () {
      this.currentHash = location.hash.slice(1) || '/'
      this.routes[this.currentHash]()
    }
  }